In order for you to play Europa Universalis III Complete on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows® 2000 (with Service pack 1 or higher) or Windows® XP (Home/Professional/Media Edition) with Service Pack 2, or later Windows versions.
Processor (CPU):
1.9GHz Intel Pentium 4 or AMD Athlon processor or equivalent
Memory (RAM):
512MB RAM (1.0GB RAM is highly recommended)
Graphics Card:
128MB Video Card with Hardware T&L and support for Pixelshader 2.0 or better
DirectX Version:
DirectX9.0c
Hard Drive:
At least 1GB of free hard drive space to accommodate game files and saved games. This does not include any space used by the Windows® swap file.
Sound:
DirectX7 compatible sound card